To unsubscribe from Google Calendar:

1. When you are in Google Calendar look on the left hand side for "Other Calendars" and from menu (the downward facing arrow) select "Settings"
2. Find your team's calendar and on the far right-hand side select Unsubscribe
3. Select Unsubscribe again at the prompt and the team will be removed

To unsubscribe from Outlook 2010:

Go to the Calendar and find the list of calendars on the left hand side
Right-click on the calendar you want to get rid of and click on Delete Calendar Name (or you can leave the calendar and just uncheck temporarily)

 To unsubscribe from your Mac:

1. Open up iCal
2. Click on the Calendar button (top left-hand side of the calendar) to show all your calendars
3. Right-click on the name of the subscribed calendar and select Delete

To unsubscribe from your iPhone:

1. Go to the Settings app
2. Go to Mail, Contacts, Calendars
3. Go to Subscribed Calendars
4. Select the team calendar you wish to delete
5. Select Delete Account
6. Select Delete again to confirm